'Bond servants' in the Bible

For many nations and great kings shall make bondservants of them, even of them; and I will recompense them according to their deeds, and according to the work of their hands.

that every man should let his male servant, and every man his female servant, who is a Hebrew or a Hebrewess, go free; that none should make bondservants of them, [to wit], of a Jew his brother.

All the princes and all the people obeyed, who had entered into the covenant, that everyone should let his male servant, and everyone his female servant, go free, that none should make bondservants of them any more; they obeyed, and let them go: